上海交通大学学报

上海交通大学学报（自然版） ›› 2017, Vol. 51 ›› Issue (1): 119-.

• 机械工程 • 上一篇    下一篇

压下模式对镁合金宏观塑性变形和微观组织演变的影响

  

  1. 1. 扬州大学 机械工程学院，江苏 扬州 225001；
    2. 上海交通大学 国家模具CAD工程研究中心，上海 200030
  • 出版日期:2017-01-31 发布日期:2017-01-31

Effects of Compressive Mode on Macroscopic Deformation and Microstructure Evolution of Magnesium Alloy

  1. 1. School of Mechanical Engineering, Yangzhou University, Yangzhou 225001, Jiangsu, China;
    2. National Die and Mold CAD Engineering Research Center, Shanghai Jiao Tong University, Shanghai 200030, China
  • Online:2017-01-31 Published:2017-01-31

摘要：

Abstract： A microstructural evolution model was integrated with a thermalmechanical elasticplastic finite element method to quantitatively simulate the hot deformation and microstructural evolution of magnesium alloy AZ31B at two different compressive modes, constant strain rate and constant die velocity. The stressstrain curves and recrystallized grain sizes were obtained from hot compressive deformation of AZ31B on Gleeble1500 thermosimulation machine and integrated with the finite element model through the user subroutine interface. It is shown that the fields of deformation and microstructure are nonuniformly distributed as a result of the existence of friction. Compared with the sample compressed at a constant strain rate, the mean value of the grain size decreases and the mean square error increases slightly for the sample at a constant die velocity.

关键词: 镁合金, 高温变形, 有限元方法, 动态再结晶, 压下模式

Abstract:

Abstract： A microstructural evolution model was integrated with a thermalmechanical elasticplastic finite element method to quantitatively simulate the hot deformation and microstructural evolution of magnesium alloy AZ31B at two different compressive modes, constant strain rate and constant die velocity. The stressstrain curves and recrystallized grain sizes were obtained from hot compressive deformation of AZ31B on Gleeble1500 thermosimulation machine and integrated with the finite element model through the user subroutine interface. It is shown that the fields of deformation and microstructure are nonuniformly distributed as a result of the existence of friction. Compared with the sample compressed at a constant strain rate, the mean value of the grain size decreases and the mean square error increases slightly for the sample at a constant die velocity.

Key words: magnesium alloy, hot deformation, finite element method, dynamic recrystallization, compressive mode

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